2026 ICD-10-CM Diagnosis Code G02Meningitis in other infectious and parasitic diseases classified elsewhere
ICD-10-CM Codes›G00–G99›G00-G09›G02
- Billable — Valid for Submission
- MCC — Major Complication or Comorbidity
- Not Chronic
G02 is a billable ICD-10-CM diagnosis code for meningitis in other infectious and parasitic diseases classified elsewhere. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 23 through 24, 97 through 99, 791, 793. As a secondary diagnosis, it counts as a major complication or comorbidity (MCC) and places an inpatient stay in the highest severity level of its MS-DRG family. It does not count, however, when the principal diagnosis is one of 40 closely related codes. The code is a manifestation code that cannot be reported as the principal diagnosis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Meningitis; and Parasitic, other specified and unspecified infections.
Code Identity
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for G02.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- African histoplasmosis
- African trypanosomiasis
- Aspergillus meningitis
- Candidal meningitis
- Central nervous system candidiasis
- Cerebrospinal nematodiasis
- Coccidioidal meningitis
- Coccidioides infection of the central nervous system
- Cryptococcal meningitis
- Cryptococcus infection of the central nervous system
- Cysticercosis of central nervous system
- Fungal meningitis
- Histoplasma infection of central nervous system
- Infection by Strongyloides stercoralis
- Infection by Trypanosoma gambiense
- Infection caused by Toxocara
- Meningitis caused by Enterovirus
- Meningitis caused by Histoplasma capsulatum
- Meningitis caused by Histoplasma duboisii
- Meningitis caused by Histoplasmosis
- Meningitis caused by Human poliovirus
- Meningitis caused by Mucorales
- Meningitis caused by Taenia solium
- Meningitis caused by Trypanosoma brucei
- Parasitic meningitis
- Strongyloides stercoralis meningitis
- Toxicariasis of the central nervous system
- Toxocara meningitis
- Trypanosoma brucei gambiense meningitis
- Trypanosoma brucei rhodesiense meningitis
- Trypanosomiasis with meningitis
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Code First
Type 1 Excludes
- candidal meningitis B37.5
- coccidioidomycosis meningitis B38.4
- cryptococcal meningitis B45.1
- herpesviral [herpes simplex] meningitis B00.3
- infectious mononucleosis complicated by meningitis B27
- measles complicated by meningitis B05.1
- meningoencephalitis and meningomyelitis in other infectious and parasitic diseases classified elsewhere G05
- mumps meningitis B26.1
- rubella meningitis B06.02
- varicella [chickenpox] meningitis B01.0
- zoster meningitis B02.1
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Coccidioidal Meningitis
meningitis caused by a fungus of the genus coccidioides, endemic to the southwestern united states, south-central washington state, and parts of mexico and central and south america.Cryptococcal Meningitis
a blood borne fungal infection of the membranes surrounding the brain and spinal column (meninges) caused by cryptococcus, usually c. neoformans or c. gattii. it usually occurs in immunocompromised patients including persons with aids, transplant recipients, patients receiving cytotoxic chemotherapy, and patients with hematologic malignancies.
Patient EducationClinical
Meningitis
Meningitis is inflammation of the thin tissue that surrounds the brain and spinal cord, called the meninges. There are several types of meningitis. The most common is viral meningitis. You get it when a virus enters the body through the nose or mouth and travels to the brain. Bacterial meningitis is rare but can be deadly.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert G02 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About G02Overview
Is G02 a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report meningitis in other infectious and parasitic diseases classified elsewhere on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does G02 group to?
On inpatient claims, meningitis in other infectious and parasitic diseases classified elsewhere maps to MS-DRG 23, 24, 97, 98, 99, 791, 793, with relative weights from 1.3624 to 5.7303 depending on complications. Higher weights mean higher Medicare reimbursement.
Is G02 a CC or MCC?
CMS lists G02 as an MCC (major complication or comorbidity) for FY 2026. Reported as a secondary diagnosis, it places the inpatient stay in the highest-weighted DRG of its severity family. It does not count when the principal diagnosis is one of the 40 closely related codes in its exclusion list.
Can G02 be a principal diagnosis?
No. This is a manifestation code: meningitis in other infectious and parasitic diseases classified elsewhere describes the manifestation of an underlying disease rather than the disease itself, so the underlying condition is sequenced first.
What is the ICD-9 equivalent of G02?
Under the General Equivalence Mappings, meningitis in other infectious and parasitic diseases classified elsewhere converts to ICD-9-CM 321.1 (mening in oth fungal dis), 321.2 (mening in oth viral dis), and 321.8 (mening in oth nonbac dis). The mapping is approximate, so confirm the match fits the documentation.
